GOALI: Characterization, Modeling, and Optimization of Magnetic Pulse Welding Processes

这项与工业界学术联络资助机会（GOALI）奖的研究目标是通过与工业合作伙伴Magneform和UNH机械工程、物理和材料科学教员的合作，对磁脉冲焊接（MPW）过程有一个基本的了解。虽然MPW作为一种工艺已经使用了几十年，但该工艺的实施通常是基于经验和反复试验。提出的研究任务是对轴对称MPW接头进行实验研究，包括变形测量；对焊缝界面和最终接头的力学性能进行材料测试；对该过程进行电磁学、热机械效应（这将允许相变）和焊缝界面处的波形形成的建模；并在实验和建模的基础上对工艺参数进行了优化。如果成功，这项研究的结果将通过减少结构的重量而造福整个社会，因为不同的金属将被有效地焊接，因此重量较轻的部件将位于非强度关键区域。此外，本研究将显著增加高速率变形和冲击条件下的建模和材料表征，如电磁成形，弹道冲击等。与Magneform合作提供了几个优势，包括将结果广泛传播到行业。研究生将受益于研究的跨学科性质，并将结果纳入几门课程。最后，教师研究经验参与者将参与研究，并根据项目的物理和磁学方面为高中教室创建模块。这种高速率的变形过程将吸引高中生的注意力和想象力，并可能吸引来自代表性不足群体的个人参与该项目。该项目由土木、机械和制造创新（CMMI）部门的材料加工和制造（MPM）项目，化学、生物工程、环境和运输系统（CBET）部门的热传输过程（TTP）项目以及工业创新和合作伙伴关系（IIP）部门的工业学术联络资助机会（GOALI）项目共同资助，这些项目都隶属于工程理事会（ENG）。

The research objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) award is to create a fundamental understanding of the Magnetic Pulsed Welding (MPW) process through a collaboration with an industrial partner Magneform and UNH faculty members from Mechanical Engineering, Physics, and Materials Science. While MPW has been used as a process for decades, the process is typically implemented based on experience and trial and error experimentation. The tasks of the proposed research are to experimentally investigate axisymmetric MPW joints including measurement of the deformation; to conduct materials testing of both the interface of the weld and the mechanical properties of the final joint; to model the process with respect to the electromagnetics, thermomechanical effects (which will allow for phase transformation), and wave formation at the interface of the weld; and to optimize the process parameters based on the experimental and modeling efforts. If successful, the results of this research will benefit society at large through reduced weight of structures as dissimilar metals will be effectively welded and thus lower weight components will be located in non-strength critical areas. In addition, this research will add significantly to the modeling and materials characterization during high rate deformation and impact conditions, such as electromagnetic forming, ballistic impact, etc. Collaborating with Magneform offers several advantages including the broad dissemination of the results to industry. Graduate students will benefit from the interdisciplinary nature of the research and incorporation of results into several courses. Finally, Research Experience for Teachers participants will be involved in the research and will create modules for high school classrooms based on the Physics and magnetism aspects of the project. This high rate deformation process will capture the attention and imagination of high school students and potentially attract individuals from underrepresented groups to the project.This project is jointly funded by the Materials Processing & Manufacturing (MPM) Program, of the Civil, Mechanical, and Manufacturing Innovation (CMMI) Division,the Thermal Transport Processes (TTP) Program, of the Chemical, Bioengineering, Environmental, and Transport Systems (CBET) Division and, the Grant Opportunity for Academic Liaison with Industry (GOALI) Program, of the Industrical Innovation and Partnerships (IIP)Divison, all within the Directorate for Engineering (ENG).